激光星间链路中振动补偿技术研究

Study of Vibration Compensation Technology in Intersatellite Laser Links

摘要:

提出了一种在激光星间链路过程中的卫星平台振动补偿方案。采用CCD探测器代替角度传感检测振动，简化了卫星光通信跟瞄系统。在激光星间链咯中，卫星平台角振动对光束的跟瞄有较大的影响，采用前馈补偿方式实现较好的抑制。在实验室中建立了卫星平台振动模拟装置和前馈振动补偿系统，针对卫星平台的实际振动情况进行了模拟实验。结果表明，对于100Hz卫星平台角振动，当CCD采样频率大于1kHz时，补偿后的瞄准误差与补偿前相比下降了71％。

Abstract:

A method of compensating the satellite vibrations in intersatellite laser links was presented.The satelite vibrations were detected using a CCD instead of the traditional angular sensors,so the tracking system was simplified.The angular errors from the satellite vibrations influence the beam tracking,while they can be well compensated by a feedforward control system.An experimental study on the vibrations compensation technology was performed,and a vibration simulation device and a feedforward compensation system were built in the lab.It shows that using a CCD with the sampling frequency of 1 kHz,tracking errors can be reduced by 71 % after vibration compensation when the frequency of angular vibrations is 100 Hz.